Important Concepts
Browse key concepts across boards and subjects. Click any concept to see explanation and related questions.
- (a) List down any four key characteristics of Light Rail Transit System (LRT).
- (b) Define :
- (i) Ruling gradient (ii) Pusher gradient (iii) Momentum gradient (iv) Grade compensation on curves
- (c) What is meant by interlocking of signals and points? List down any three essential regulations.
- (d) Describe the operation of centralized train control system (CTC).
- (e) What are the important wave characteristics? Write down the inter- relationship among these char
- (a) Explain the factors involved in the selection of good alignment for a railway line. Illustrate w
- (b) Explain the necessity and effects of coning of wheels with the help of sketches.
- (a) Explain the functions of rails and various types of rails in use.
- (b) What are the requirement of sleepers used in a railway track? Using a sleeper density $\mathrm{N
- (a) What is negative super elevation? A $1^{\circ}$ curve track diverges from a main curve of $3^{\c
- (b) Explain the train resistances that a locomotive has to overcome in hauling a train on a gradient
- (a) Why is widening of gauge required on sharp curves? Determine the extent of gauge widening requir
- (b) Compute the steepest gradient that a train of 20 wagons and a locomotive can negotiate given the
- Find the relation between $\alpha$ and $\beta$ of BJT.
- Compare and contrast FET and BJT
- Implement the following function using minimum number of logic gates $Y=A \bar{B}+C D+\bar{B} \bar{D
- What are the characteristics of an ideal OP AMP?
- Explain the term biasing and what is the need for proper biasing?
- What are the factors that affect the Radar range?
- Draw the block diagram of satellite transponder.
- Explain the basic principle of cellular communication.
- Draw the block diagram of optical communication system.
- State and explain Barkhausen Criterion for sustained oscillations. (Answer any one full question fr
- (a) Explain the principle and working of (i) Zener diode (ii) LED
- (b) Draw the structure of PNP transistor and explain its working.
- (a) (i) Compare sequential and combinational logic circuits. (ii) With the help of truth table, expl
- Write a short note on Expansion of Solids, Liquids, Gases.
- Define Temperature.
- Write a short note on Sound and Hearing.
- Explain the concept of Sound and Hearing.
- Write a short note on Friction.
- Define Reflection.
- (b) Draw typical drain characteristics of a JFET. Explain the shape of these curves qualitatively.
- (a) With neat circuit diagram and wave forms, Explain the working of a full wave rectifier.
- (b) Explain with block diagram, the principle and working of RC phase shift oscillator.
- (a) Draw the block diagram of function generator and explain its working.
- (b) Explain the working of simple Zener voltage regulator.
- (a) Draw the block diagram of super heterodyne receiver and explain its working.
- (b) Draw the block diagram of FM transmitter, explain its working. OR
- (a) (i) Explain the principle of GPS. (ii) Explain the concept of Geo stationary satellite.
- (b) With block diagram, explain the operation of PCM system.
- (a) With block diagram ,explain the operation of GSM.
- (b) Explain the terms
- (i) frequency reuse (ii) cell splitting
- (a) With the help of block diagram explain an optical communication system.
- (b) With the block diagram, explain the operation of color television.
- State and explain Faraday's laws of electromagnetic induction.
- What are the advantages of 3 phase system?
- Prove that self inductance is directly proportional to square of number of turns.
- Draw the phasor diagram of an R-L circuit. How can we define power factor in 2 different ways.
- Explain the working of incandescent lamp.
- Write down the need for high voltage transmission.
- Explain the working of a transformer.
- Define ripple factor and write the values for half wave rectifiers.
- Plot the forward and reverse characteristics of a PN diode.
- What is the role of filters in rectifier? List different types of filters?
- (a) A coil is connected in series with a non-inductive resistance of $30 \Omega$ across $240 \mathrm
- (i) Power absorbed by coil (ii) Inductance ỡ coil (iii) resistance of coil (iv) power factor of whol
- (b) With neat diagram explain the working of 1 phase energy meter
- (a) Define
- (i) Active power (ii) Reactive power (iii) Apparent power
- (b) Derive the relation between phase and line value of voltage and current in a star connected syst
- (c) Explain the measurement of power in $3 \phi$ circuit using 2 Wattmeter method. 8
- With a neat diagram describe Pipe earthing. 20
- Explain Simple Linear Equations with suitable examples.
- Explain Algebraic Expressions with suitable examples.
- Discuss the principles behind Collection and Representation of Data.
- Write a detailed explanation of Lines and Angles.
- Write a detailed explanation of Constructions.
- Define Main Idea and Supporting Details.
- With the help of schematic layout explain the working of Nuclear power plant.
- (a) What is the working principle of SMPS?
- (b) Discuss the working principle of solar cell and photo diode and differentiate them.
- (a) Explain the working principle of LED. Explain the method of generation of different colours in L
- (b) What is the working principle of Zener diode? Differentiate between Zener and Avalanche breakdow
- (c) Draw and explain the working of a full wave diode rectifier with resistive load and derive the e
- What is Parallax error? How it is eliminated?
- Name the methods of booking level staff reading. What are the merits and demerits?
- When you will recommend trapezoidal footing?
- Explain the merits of Ready Mixed Concrete.
- What are the advantages of use of recycled materials in construction for the environment? ( $\mathbf
- The following staff reading were observed successfully with level, he instrument having been moved f
- What are the characteristics of contours? Explain briefly with example.
- Briefly explain differ types of foundations.
- Which are the types of flooring? Explain its construction and place of recommendation.
- (a) What are the desirable qualities of coarse aggregate?
- (b) Which are the tests on cement? Explain setting time test as per the I.S code. OR
- (a) What is proportioning of concrete? Explain its importance.
- (b) Name the tests conducted for workability. Illustrate any one. Module - IV
- Describe in detail Green building concepts and its importance. OR
- Hint on Environmental issues of (a) Global warming
- Hint on Environmental issues of (b) Deforestation
- State and explain Lenz's law.
- Define: 1) mmf 2) Reluctance.
- Explain the concept of phase and phase difference.
- Define RMS value and average value of an alternating quantity.
- What are the advantages of High Voltage transmission ?
- Distinguish between core type and shell type construction of Transformer core.
- Compare Hydro-electric and Thermal power generation.